:root {
  --highlight-color: #6374af;
  --decoration-gradient: linear-gradient(#6374af, #2f3966);
}

html,
body {
  padding: 0;
  margin: 0;
}

@media (max-width: 768px) {
  #nav-header-container h1 {
    font-size: 2.5em;
  }
  .common-pc {
    display: none !important;
  }
}

@media (min-width: 768px) {
  #nav-header-container h1 {
    font-size: 3em;
  }
  .common-mobile {
    display: none !important;
  }
}

.common-header,
.common-sec-header {
  color: var(--highlight-color);
}

.common-header::before,
.common-sec-header::before {
  background: var(--decoration-gradient);
  height: 100%;
  width: 1em;
  content: ".";
  color: transparent;
  margin: 0 0.3em 0 0.2em;
  border-radius: 0.5em;
}

.common-decorate-translations {
  font-size: 0.5em;
  font-weight: normal;
}

#common-main {
  padding: 1em 3em;
  width: 768px;
  flex-shrink: 1;
}

#common-main-wrapper {
  display: flex;
  justify-content: center;
}
